Bayan Dieselgate ya lullube Diesels a cikin duhu mai duhu - mun ce "tabbas", saboda a zahiri, an riga an yi muhawara game da ƙarshensa cikin ladabi kafin - yanzu ana buƙatar maye gurbin da ya dace. Ana so ko a'a, gaskiyar ita ce injunan diesel sun kasance kuma suna ci gaba da zama zaɓi na yawancin masu amfani. Kuma a'a, ba kawai a Portugal ba… Ɗauki wannan misalin.
Madadi: so!
Zai ɗauki ɗan lokaci kafin wutar lantarki ya zama sabon "al'ada" ga masana'antar mota - an yi kiyasin cewa a shekarar 2025 rabon motocin lantarki 100% har yanzu yana kusa da 10%, wanda ba shi da yawa.Sabili da haka, har sai zuwan wannan sabon "al'ada", ana buƙatar mafita wanda ke ba da tattalin arzikin amfani da matakin watsi da Diesel a farashin siyan injunan gas.
Menene madadin wannan?
Wani abin ban mamaki shi ne, kamfanin nan na Volkswagen, wanda ke a jigon girgizar kasar, ya fito da wani madadin Diesel. A cewar alamar Jamusanci, madadin zai iya zama sabon injin sake zagayowar ku na B. Don haka ƙara ƙarin nau'in sake zagayowar guda ɗaya ga waɗanda ke cikin injin petur: Otto, Atkinson da Miller.
Kewaya da ƙari
Mafi sanannun shine zagayowar Otto, mafita mafi maimaitawa a cikin masana'antar kera motoci. Kewayoyin Atkinson da Miller sun tabbatar da sun fi dacewa a kashe takamaiman aiki.
Riba (a cikin inganci) da hasara (a cikin aiki) saboda lokacin buɗewa na bawul ɗin shigarwa a cikin lokacin matsawa. Wannan lokacin buɗewa yana haifar da lokacin matsawa wanda ya fi guntu lokacin haɓakawa.
Wani ɓangare na kaya a lokacin matsawa ana fitar da shi ta hanyar bawul ɗin shigarwa wanda har yanzu yana buɗe. A piston haka sami m juriya ga matsawa na gas - dalilin da ya sa takamaiman yadda ya dace ne m, wato, shi ya haifar da kasa da horsepower da Nm. Wannan shi ne inda Miller sake zagayowar, kuma aka sani da «biyar-bugun jini» engine. ya shigo. wanda, lokacin da ake amfani da caji mai girma, yana mayar da wannan cajin da ya ɓace zuwa ɗakin konewa.
A yau, godiya ga karuwar iko na duk tsarin konewa, har ma da injunan zagayowar Otto sun riga sun sami damar yin kwatankwacin hawan keke na Atkinson lokacin da lodi ya yi ƙasa (don haka ƙara ƙarfin su).
To ta yaya zagaye B ke aiki?
Ainihin, sake zagayowar B shine juyin halittar Miller. Zagayen Miller yana rufe bawul ɗin sha kafin ƙarshen bugun jini ya ƙare. Zagayen B ya bambanta da zagayowar Miller domin yana rufe bawuloli masu shiga da yawa a baya. Sakamakon ya fi tsayi, ingantaccen konewa da saurin iskar gas zuwa ga iskar gas, wanda ke inganta cakuda mai / iska.
Ɗaya daga cikin abũbuwan amfãni na wannan sabon sake zagayowar B shine samun damar canzawa zuwa zagayowar Otto lokacin da ake buƙatar matsakaicin iko, komawa zuwa mafi kyawun sake zagayowar B yayin yanayin amfani na yau da kullun. Wannan yana yiwuwa ne kawai godiya ga ƙaurawar axial na camshaft - wanda ke da cams biyu don kowane bawul - ƙyale lokutan buɗewa na bawuloli masu shiga don canza su ga kowane hawan keke.
Wurin farawa
Injin EA888 shine wurin farawa don wannan mafita. An riga an san shi daga wasu aikace-aikacen a cikin rukunin Jamus, injin turbo ne na 2.0 l tare da silinda huɗu a cikin layi. An inganta wannan injin ne a matakin kai (yana karɓar sabbin camshafts da bawuloli) don yin aiki bisa ga sigogin wannan sabon sake zagayowar. Wadannan canje-canjen kuma sun tilasta sake fasalin pistons, sassan da ɗakin konewa.Domin samun ramawa ga ɗan gajeren lokaci na matsawa, Volkswagen ya ɗaga ƙimar matsawa zuwa 11.7:1, ƙimar da ba a taɓa ganin irin ta ba don injuna mai caji, wanda ke tabbatar da ƙarfafa wasu abubuwan. Ko da EA888 na yanzu baya wuce 9.6: 1. Ita ma allurar kai tsaye ta ga karfinta ya karu, yanzu ya kai sanduna 250.
A matsayin juyin halitta na EA888, an gano ƙarni na uku na wannan dangin injin a matsayin EA888 Gen. 3B.
mu je lambobi
EA888 B yana kula da dukkanin silinda hudu a layi da 2.0 l na iya aiki, da kuma amfani da turbo. Yana ba da kusan 184 hp tsakanin 4400 da 6000 rpm da 300 Nm na karfin juyi tsakanin 1600 da 3940 rpm . Wannan injin da farko zai yi niyyar maye gurbin 1.8 TSI wanda ke ba da yawancin samfuran samfuran Jamus waɗanda ake siyarwa a kasuwar Arewacin Amurka.
Ragewa don ingantaccen inganci? Ko ganinsa.
Zai kasance har zuwa sabon Volkswagen Tiguan fara sabon injin a Amurka. Bisa ga alamar, sabon 2.0 zai ba da damar yin aiki mafi kyau da ƙananan amfani da hayaki idan aka kwatanta da 1.8 wanda ya daina aiki.
A halin yanzu, babu bayanan hukuma game da amfani. Amma alamar ta ƙididdige raguwar amfani da kusan 8%, adadi wanda za a iya inganta shi sosai tare da haɓaka wannan sabon sake zagayowar B.